1 ##########################################################################
3 # Copyright 2008-2010 VMware, Inc.
6 # Permission is hereby granted, free of charge, to any person obtaining a copy
7 # of this software and associated documentation files (the "Software"), to deal
8 # in the Software without restriction, including without limitation the rights
9 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 # copies of the Software, and to permit persons to whom the Software is
11 # furnished to do so, subject to the following conditions:
13 # The above copyright notice and this permission notice shall be included in
14 # all copies or substantial portions of the Software.
16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 ##########################################################################/
33 """Base class for all types."""
37 def __init__(self, expr, tag = None):
40 # Generate a default tag, used when naming functions that will operate
41 # on this type, so it should preferrably be something representative of
45 tag = ''.join([c for c in expr if c.isalnum() or c in '_'])
50 assert c.isalnum() or c in '_'
52 # Ensure it is unique.
53 if tag in Type.__tags:
55 while tag + str(suffix) in Type.__tags:
59 assert tag not in Type.__tags
65 """Return the C/C++ type expression for this type."""
68 def visit(self, visitor, *args, **kwargs):
69 raise NotImplementedError
72 '''Return a mutable version of this type.
74 Convenience wrapper around MutableRebuilder.'''
75 visitor = MutableRebuilder()
76 return visitor.visit(self)
80 """Singleton void type."""
83 Type.__init__(self, "void")
85 def visit(self, visitor, *args, **kwargs):
86 return visitor.visitVoid(self, *args, **kwargs)
92 """Class to describe literal types.
94 Types which are not defined in terms of other types, such as integers and
97 def __init__(self, expr, kind):
98 Type.__init__(self, expr)
101 def visit(self, visitor, *args, **kwargs):
102 return visitor.visitLiteral(self, *args, **kwargs)
105 Bool = Literal("bool", "Bool")
106 SChar = Literal("signed char", "SInt")
107 UChar = Literal("unsigned char", "UInt")
108 Short = Literal("short", "SInt")
109 Int = Literal("int", "SInt")
110 Long = Literal("long", "SInt")
111 LongLong = Literal("long long", "SInt")
112 UShort = Literal("unsigned short", "UInt")
113 UInt = Literal("unsigned int", "UInt")
114 ULong = Literal("unsigned long", "UInt")
115 ULongLong = Literal("unsigned long long", "UInt")
116 Float = Literal("float", "Float")
117 Double = Literal("double", "Double")
118 SizeT = Literal("size_t", "UInt")
120 Char = Literal("char", "SInt")
121 WChar = Literal("wchar_t", "SInt")
123 Int8 = Literal("int8_t", "SInt")
124 UInt8 = Literal("uint8_t", "UInt")
125 Int16 = Literal("int16_t", "SInt")
126 UInt16 = Literal("uint16_t", "UInt")
127 Int32 = Literal("int32_t", "SInt")
128 UInt32 = Literal("uint32_t", "UInt")
129 Int64 = Literal("int64_t", "SInt")
130 UInt64 = Literal("uint64_t", "UInt")
132 IntPtr = Literal("intptr_t", "SInt")
133 UIntPtr = Literal("uintptr_t", "UInt")
137 def __init__(self, type):
138 # While "const foo" and "foo const" are synonymous, "const foo *" and
139 # "foo * const" are not quite the same, and some compilers do enforce
140 # strict const correctness.
141 if type.expr.startswith("const ") or '*' in type.expr:
142 expr = type.expr + " const"
145 expr = "const " + type.expr
147 Type.__init__(self, expr, 'C' + type.tag)
151 def visit(self, visitor, *args, **kwargs):
152 return visitor.visitConst(self, *args, **kwargs)
157 def __init__(self, type):
158 Type.__init__(self, type.expr + " *", 'P' + type.tag)
161 def visit(self, visitor, *args, **kwargs):
162 return visitor.visitPointer(self, *args, **kwargs)
165 class IntPointer(Type):
166 '''Integer encoded as a pointer.'''
168 def visit(self, visitor, *args, **kwargs):
169 return visitor.visitIntPointer(self, *args, **kwargs)
172 class ObjPointer(Type):
173 '''Pointer to an object.'''
175 def __init__(self, type):
176 Type.__init__(self, type.expr + " *", 'P' + type.tag)
179 def visit(self, visitor, *args, **kwargs):
180 return visitor.visitObjPointer(self, *args, **kwargs)
183 class LinearPointer(Type):
184 '''Pointer to a linear range of memory.'''
186 def __init__(self, type, size = None):
187 Type.__init__(self, type.expr + " *", 'P' + type.tag)
191 def visit(self, visitor, *args, **kwargs):
192 return visitor.visitLinearPointer(self, *args, **kwargs)
195 class Reference(Type):
196 '''C++ references.'''
198 def __init__(self, type):
199 Type.__init__(self, type.expr + " &", 'R' + type.tag)
202 def visit(self, visitor, *args, **kwargs):
203 return visitor.visitReference(self, *args, **kwargs)
208 def __init__(self, name, type, range=None, key=None):
209 Type.__init__(self, type.expr, 'P' + type.tag)
215 def visit(self, visitor, *args, **kwargs):
216 return visitor.visitHandle(self, *args, **kwargs)
219 def ConstPointer(type):
220 return Pointer(Const(type))
227 def __init__(self, name, values):
228 Type.__init__(self, name)
233 self.values = list(values)
235 def visit(self, visitor, *args, **kwargs):
236 return visitor.visitEnum(self, *args, **kwargs)
239 def FakeEnum(type, values):
240 return Enum(type.expr, values)
247 def __init__(self, type, values):
248 Type.__init__(self, type.expr)
250 self.id = Bitmask.__id
256 def visit(self, visitor, *args, **kwargs):
257 return visitor.visitBitmask(self, *args, **kwargs)
264 def __init__(self, type, length):
265 Type.__init__(self, type.expr + " *")
269 def visit(self, visitor, *args, **kwargs):
270 return visitor.visitArray(self, *args, **kwargs)
273 class AttribArray(Type):
275 def __init__(self, keyType, valueTypes, isConst = True, punType = None, terminator = '0'):
277 if punType is not None:
278 self.baseType = punType
280 Type.__init__(self, (Pointer(Const(self.baseType))).expr)
282 Type.__init__(self, (Pointer(self.baseType)).expr)
283 self.keyType = keyType
284 self.valueTypes = valueTypes
285 self.terminator = terminator
286 self.hasKeysWithoutValues = False
287 for key, value in valueTypes:
289 self.hasKeysWithoutValues = True
291 def visit(self, visitor, *args, **kwargs):
292 return visitor.visitAttribArray(self, *args, **kwargs)
297 def __init__(self, type, size):
298 Type.__init__(self, type.expr + ' *')
302 def visit(self, visitor, *args, **kwargs):
303 return visitor.visitBlob(self, *args, **kwargs)
310 def __init__(self, name, members):
311 Type.__init__(self, name)
313 self.id = Struct.__id
317 self.members = members
319 def visit(self, visitor, *args, **kwargs):
320 return visitor.visitStruct(self, *args, **kwargs)
323 def Union(kindExpr, kindTypes, contextLess=True):
325 for kindCase, kindType, kindMemberName in kindTypes:
326 switchType = Struct(None, [(kindType, kindMemberName)])
327 switchTypes.append((kindCase, switchType))
328 return Polymorphic(kindExpr, switchTypes, contextLess=contextLess)
333 def __init__(self, expr, type):
334 Type.__init__(self, expr)
337 def visit(self, visitor, *args, **kwargs):
338 return visitor.visitAlias(self, *args, **kwargs)
342 def __init__(self, type, name, input=True, output=False):
350 return '%s %s' % (self.type, self.name)
354 return Arg(type, name, input=True, output=False)
357 return Arg(type, name, input=False, output=True)
359 def InOut(type, name):
360 return Arg(type, name, input=True, output=True)
365 def __init__(self, type, name, args, call = '', fail = None, sideeffects=True, internal=False):
372 if not isinstance(arg, Arg):
373 if isinstance(arg, tuple):
374 arg_type, arg_name = arg
377 arg_name = "arg%u" % index
378 arg = Arg(arg_type, arg_name)
381 self.args.append(arg)
385 self.sideeffects = sideeffects
386 self.internal = internal
388 def prototype(self, name=None):
395 s = self.call + ' ' + s
396 if name.startswith('*'):
398 s = self.type.expr + ' ' + s
401 s += ", ".join(["%s %s" % (arg.type, arg.name) for arg in self.args])
408 return [arg.name for arg in self.args]
410 def getArgByName(self, name):
411 for arg in self.args:
417 def StdFunction(*args, **kwargs):
418 kwargs.setdefault('call', '__stdcall')
419 return Function(*args, **kwargs)
422 def FunctionPointer(type, name, args, **kwargs):
423 # XXX: We should probably treat function pointers (callbacks or not) in a generic fashion
427 class Interface(Type):
429 def __init__(self, name, base=None):
430 Type.__init__(self, name)
435 def visit(self, visitor, *args, **kwargs):
436 return visitor.visitInterface(self, *args, **kwargs)
438 def getMethodByName(self, name):
439 for method in self.iterMethods():
440 if method.name == name:
444 def iterMethods(self):
445 if self.base is not None:
446 for method in self.base.iterMethods():
448 for method in self.methods:
454 while iface is not None:
459 def hasBase(self, *bases):
460 for iface in self.iterBases():
465 def iterBaseMethods(self):
466 if self.base is not None:
467 for iface, method in self.base.iterBaseMethods():
469 for method in self.methods:
474 class Method(Function):
476 def __init__(self, type, name, args, call = '', const=False, sideeffects=True):
477 assert call == '__stdcall'
478 Function.__init__(self, type, name, args, call = call, sideeffects=sideeffects)
479 for index in range(len(self.args)):
480 self.args[index].index = index + 1
483 def prototype(self, name=None):
484 s = Function.prototype(self, name)
490 def StdMethod(*args, **kwargs):
491 kwargs.setdefault('call', '__stdcall')
492 return Method(*args, **kwargs)
496 '''Human-legible character string.'''
498 def __init__(self, type = Char, length = None, wide = False):
499 assert isinstance(type, Type)
500 Type.__init__(self, type.expr + ' *')
505 def visit(self, visitor, *args, **kwargs):
506 return visitor.visitString(self, *args, **kwargs)
510 '''Opaque pointer.'''
512 def __init__(self, expr):
513 Type.__init__(self, expr)
515 def visit(self, visitor, *args, **kwargs):
516 return visitor.visitOpaque(self, *args, **kwargs)
519 def OpaquePointer(type, *args):
520 return Opaque(type.expr + ' *')
522 def OpaqueArray(type, size):
523 return Opaque(type.expr + ' *')
525 def OpaqueBlob(type, size):
526 return Opaque(type.expr + ' *')
529 class Polymorphic(Type):
531 def __init__(self, switchExpr, switchTypes, defaultType=None, contextLess=True):
532 if defaultType is None:
533 Type.__init__(self, None)
536 Type.__init__(self, defaultType.expr)
537 self.switchExpr = switchExpr
538 self.switchTypes = switchTypes
539 self.defaultType = defaultType
540 self.contextLess = contextLess
542 def visit(self, visitor, *args, **kwargs):
543 return visitor.visitPolymorphic(self, *args, **kwargs)
545 def iterSwitch(self):
549 if self.defaultType is not None:
550 cases.append(['default'])
551 types.append(self.defaultType)
553 for expr, type in self.switchTypes:
554 case = 'case %s' % expr
556 i = types.index(type)
561 cases[i].append(case)
563 return zip(cases, types)
566 def EnumPolymorphic(enumName, switchExpr, switchTypes, defaultType, contextLess=True):
567 enumValues = [expr for expr, type in switchTypes]
568 enum = Enum(enumName, enumValues)
569 polymorphic = Polymorphic(switchExpr, switchTypes, defaultType, contextLess)
570 return enum, polymorphic
574 '''Abstract visitor for the type hierarchy.'''
576 def visit(self, type, *args, **kwargs):
577 return type.visit(self, *args, **kwargs)
579 def visitVoid(self, void, *args, **kwargs):
580 raise NotImplementedError
582 def visitLiteral(self, literal, *args, **kwargs):
583 raise NotImplementedError
585 def visitString(self, string, *args, **kwargs):
586 raise NotImplementedError
588 def visitConst(self, const, *args, **kwargs):
589 raise NotImplementedError
591 def visitStruct(self, struct, *args, **kwargs):
592 raise NotImplementedError
594 def visitArray(self, array, *args, **kwargs):
595 raise NotImplementedError
597 def visitAttribArray(self, array, *args, **kwargs):
598 raise NotImplementedError
600 def visitBlob(self, blob, *args, **kwargs):
601 raise NotImplementedError
603 def visitEnum(self, enum, *args, **kwargs):
604 raise NotImplementedError
606 def visitBitmask(self, bitmask, *args, **kwargs):
607 raise NotImplementedError
609 def visitPointer(self, pointer, *args, **kwargs):
610 raise NotImplementedError
612 def visitIntPointer(self, pointer, *args, **kwargs):
613 raise NotImplementedError
615 def visitObjPointer(self, pointer, *args, **kwargs):
616 raise NotImplementedError
618 def visitLinearPointer(self, pointer, *args, **kwargs):
619 raise NotImplementedError
621 def visitReference(self, reference, *args, **kwargs):
622 raise NotImplementedError
624 def visitHandle(self, handle, *args, **kwargs):
625 raise NotImplementedError
627 def visitAlias(self, alias, *args, **kwargs):
628 raise NotImplementedError
630 def visitOpaque(self, opaque, *args, **kwargs):
631 raise NotImplementedError
633 def visitInterface(self, interface, *args, **kwargs):
634 raise NotImplementedError
636 def visitPolymorphic(self, polymorphic, *args, **kwargs):
637 raise NotImplementedError
638 #return self.visit(polymorphic.defaultType, *args, **kwargs)
641 class OnceVisitor(Visitor):
642 '''Visitor that guarantees that each type is visited only once.'''
645 self.__visited = set()
647 def visit(self, type, *args, **kwargs):
648 if type not in self.__visited:
649 self.__visited.add(type)
650 return type.visit(self, *args, **kwargs)
654 class Rebuilder(Visitor):
655 '''Visitor which rebuild types as it visits them.
657 By itself it is a no-op -- it is intended to be overwritten.
660 def visitVoid(self, void):
663 def visitLiteral(self, literal):
666 def visitString(self, string):
667 string_type = self.visit(string.type)
668 if string_type is string.type:
671 return String(string_type, string.length, string.wide)
673 def visitConst(self, const):
674 const_type = self.visit(const.type)
675 if const_type is const.type:
678 return Const(const_type)
680 def visitStruct(self, struct):
681 members = [(self.visit(type), name) for type, name in struct.members]
682 return Struct(struct.name, members)
684 def visitArray(self, array):
685 type = self.visit(array.type)
686 return Array(type, array.length)
688 def visitBlob(self, blob):
689 type = self.visit(blob.type)
690 return Blob(type, blob.size)
692 def visitEnum(self, enum):
695 def visitBitmask(self, bitmask):
696 type = self.visit(bitmask.type)
697 return Bitmask(type, bitmask.values)
699 def visitPointer(self, pointer):
700 pointer_type = self.visit(pointer.type)
701 if pointer_type is pointer.type:
704 return Pointer(pointer_type)
706 def visitIntPointer(self, pointer):
709 def visitObjPointer(self, pointer):
710 pointer_type = self.visit(pointer.type)
711 if pointer_type is pointer.type:
714 return ObjPointer(pointer_type)
716 def visitLinearPointer(self, pointer):
717 pointer_type = self.visit(pointer.type)
718 if pointer_type is pointer.type:
721 return LinearPointer(pointer_type)
723 def visitReference(self, reference):
724 reference_type = self.visit(reference.type)
725 if reference_type is reference.type:
728 return Reference(reference_type)
730 def visitHandle(self, handle):
731 handle_type = self.visit(handle.type)
732 if handle_type is handle.type:
735 return Handle(handle.name, handle_type, range=handle.range, key=handle.key)
737 def visitAlias(self, alias):
738 alias_type = self.visit(alias.type)
739 if alias_type is alias.type:
742 return Alias(alias.expr, alias_type)
744 def visitOpaque(self, opaque):
747 def visitInterface(self, interface, *args, **kwargs):
750 def visitPolymorphic(self, polymorphic):
751 switchExpr = polymorphic.switchExpr
752 switchTypes = [(expr, self.visit(type)) for expr, type in polymorphic.switchTypes]
753 if polymorphic.defaultType is None:
756 defaultType = self.visit(polymorphic.defaultType)
757 return Polymorphic(switchExpr, switchTypes, defaultType, polymorphic.contextLess)
760 class MutableRebuilder(Rebuilder):
761 '''Type visitor which derives a mutable type.'''
763 def visitString(self, string):
766 def visitConst(self, const):
767 # Strip out const qualifier
770 def visitAlias(self, alias):
771 # Tear the alias on type changes
772 type = self.visit(alias.type)
773 if type is alias.type:
777 def visitReference(self, reference):
778 # Strip out references
779 return reference.type
782 class Traverser(Visitor):
783 '''Visitor which all types.'''
785 def visitVoid(self, void, *args, **kwargs):
788 def visitLiteral(self, literal, *args, **kwargs):
791 def visitString(self, string, *args, **kwargs):
794 def visitConst(self, const, *args, **kwargs):
795 self.visit(const.type, *args, **kwargs)
797 def visitStruct(self, struct, *args, **kwargs):
798 for type, name in struct.members:
799 self.visit(type, *args, **kwargs)
801 def visitArray(self, array, *args, **kwargs):
802 self.visit(array.type, *args, **kwargs)
804 def visitAttribArray(self, attribs, *args, **kwargs):
805 for key, valueType in attribs.valueTypes:
806 if valueType is not None:
807 self.visit(valueType, *args, **kwargs)
809 def visitBlob(self, array, *args, **kwargs):
812 def visitEnum(self, enum, *args, **kwargs):
815 def visitBitmask(self, bitmask, *args, **kwargs):
816 self.visit(bitmask.type, *args, **kwargs)
818 def visitPointer(self, pointer, *args, **kwargs):
819 self.visit(pointer.type, *args, **kwargs)
821 def visitIntPointer(self, pointer, *args, **kwargs):
824 def visitObjPointer(self, pointer, *args, **kwargs):
825 self.visit(pointer.type, *args, **kwargs)
827 def visitLinearPointer(self, pointer, *args, **kwargs):
828 self.visit(pointer.type, *args, **kwargs)
830 def visitReference(self, reference, *args, **kwargs):
831 self.visit(reference.type, *args, **kwargs)
833 def visitHandle(self, handle, *args, **kwargs):
834 self.visit(handle.type, *args, **kwargs)
836 def visitAlias(self, alias, *args, **kwargs):
837 self.visit(alias.type, *args, **kwargs)
839 def visitOpaque(self, opaque, *args, **kwargs):
842 def visitInterface(self, interface, *args, **kwargs):
843 if interface.base is not None:
844 self.visit(interface.base, *args, **kwargs)
845 for method in interface.iterMethods():
846 for arg in method.args:
847 self.visit(arg.type, *args, **kwargs)
848 self.visit(method.type, *args, **kwargs)
850 def visitPolymorphic(self, polymorphic, *args, **kwargs):
851 for expr, type in polymorphic.switchTypes:
852 self.visit(type, *args, **kwargs)
853 if polymorphic.defaultType is not None:
854 self.visit(polymorphic.defaultType, *args, **kwargs)
857 class Collector(Traverser):
858 '''Visitor which collects all unique types as it traverses them.'''
861 self.__visited = set()
864 def visit(self, type):
865 if type in self.__visited:
867 self.__visited.add(type)
868 Visitor.visit(self, type)
869 self.types.append(type)
873 '''Mixin class that provides a bunch of methods to expand C expressions
874 from the specifications.'''
879 def expand(self, expr):
880 # Expand a C expression, replacing certain variables
881 if not isinstance(expr, basestring):
885 if self.__structs is not None:
886 variables['self'] = '(%s)' % self.__structs[0]
887 if self.__indices is not None:
888 variables['i'] = self.__indices[0]
890 expandedExpr = expr.format(**variables)
891 if expandedExpr != expr and 0:
892 sys.stderr.write(" %r -> %r\n" % (expr, expandedExpr))
895 def visitMember(self, member, structInstance, *args, **kwargs):
896 memberType, memberName = member
897 if memberName is None:
898 # Anonymous structure/union member
899 memberInstance = structInstance
901 memberInstance = '(%s).%s' % (structInstance, memberName)
902 self.__structs = (structInstance, self.__structs)
904 return self.visit(memberType, memberInstance, *args, **kwargs)
906 _, self.__structs = self.__structs
908 def visitElement(self, elementIndex, elementType, *args, **kwargs):
909 self.__indices = (elementIndex, self.__indices)
911 return self.visit(elementType, *args, **kwargs)
913 _, self.__indices = self.__indices
917 '''A collection of functions.'''
919 def __init__(self, name = None):
925 def addFunctions(self, functions):
926 self.functions.extend(functions)
928 def addInterfaces(self, interfaces):
929 self.interfaces.extend(interfaces)
931 def mergeModule(self, module):
932 self.headers.extend(module.headers)
933 self.functions.extend(module.functions)
934 self.interfaces.extend(module.interfaces)
936 def getFunctionByName(self, name):
937 for function in self.functions:
938 if function.name == name:
946 Essentially, a collection of types, functions, and interfaces.
949 def __init__(self, modules = None):
951 if modules is not None:
952 self.modules.extend(modules)
954 def getAllTypes(self):
955 collector = Collector()
956 for module in self.modules:
957 for function in module.functions:
958 for arg in function.args:
959 collector.visit(arg.type)
960 collector.visit(function.type)
961 for interface in module.interfaces:
962 collector.visit(interface)
963 for method in interface.iterMethods():
964 for arg in method.args:
965 collector.visit(arg.type)
966 collector.visit(method.type)
967 return collector.types
969 def getAllFunctions(self):
971 for module in self.modules:
972 functions.extend(module.functions)
975 def getAllInterfaces(self):
976 types = self.getAllTypes()
977 interfaces = [type for type in types if isinstance(type, Interface)]
978 for module in self.modules:
979 for interface in module.interfaces:
980 if interface not in interfaces:
981 interfaces.append(interface)
984 def addModule(self, module):
985 self.modules.append(module)
987 def getFunctionByName(self, name):
988 for module in self.modules:
989 for function in module.functions:
990 if function.name == name:
995 # C string (i.e., zero terminated)
996 CString = String(Char)
997 WString = String(WChar, wide=True)
998 ConstCString = String(Const(Char))
999 ConstWString = String(Const(WChar), wide=True)